Ounsted M, Moar V A
Acta Paediatr Scand. 1987 Mar;76(2):215-20. doi: 10.1111/j.1651-2227.1987.tb10450.x.
501 small (SGA), 330 average (AGA) and 460 large for gestational age (LGA) babies were measured at birth. Head-chest, head-crown-rump length, and chest-crown-rump length ratios were used to evaluate the changing patterns of proportionality with increasing gestational age. The SGA group showed strong negative correlations for head-chest and head-length ratios, and positive correlations for chest-length ratios. The patterns were similar in the AGA group, only less evident. For all three measures of proportionality, correlations with gestational age in the LGA group were close to zero. In each group boys had higher head-chest ratios than girls.
对501名小于胎龄儿（SGA）、330名适于胎龄儿（AGA）和460名大于胎龄儿（LGA）在出生时进行了测量。采用头胸比、头臀长比和胸臀长比来评估随着胎龄增加比例的变化模式。SGA组头胸比和头长比呈强负相关，胸长比呈正相关。AGA组的模式相似，只是不太明显。对于所有三种比例测量指标，LGA组与胎龄的相关性接近零。在每组中，男孩的头胸比高于女孩。
